With the continuous advancement and development of the medical industry, the classification of medical devices has become more and more obvious, and more achievements have been made in their respective fields. Among many medical devices, handheld medical devices have become the focus of attention. From an objective point of view, handheld medical devices are not only easy to use, but also can bring a lot of help, can reduce the operating space for patients and medical personnel, and improve medical effects, which is a relatively high-end product. However, after being widely welcomed, hand-held medical devices have not developed according to the expected track. Many hand-held medical devices have begun to make gimmicks and flowers, and the practical value is continuously reduced. The surface functions are very sound, actually for patients and medical treatment. The help of the staff is not great. Therefore, in the future design work, designers must grasp the design points of handheld medical devices, and steadily increase the value of handheld medical devices.

Compared with general medical devices, handheld medical devices have a wide range of functions, such as meeting patient requirements, occupying less space, facilitating maintenance, and being free to carry. Due to the widespread use of handheld medical devices and the great help for medical personnel and patients, many handheld medical devices are beginning to expand into new areas and have spawned a range of products. In practical applications, these products have not been praised as always, but have caused social discussion and academic debate. The key point is that the design points of handheld medical devices are wrong and affect the overall of handheld medical devices. Use and subsequent development. This study mainly analyzes the design points of handheld medical devices, and is now summarized as follows.

1 Features of handheld medical devices

1.1 Security

For handheld medical devices, the reason for the wide range of daily applications is that the product has a high level of safety. The application fields of medical devices are very extensive, and they have great positive significance for medical staff, disabled patients, and research work in the medical field, and can objectively change the current status of medical work and the lifestyle of patients to achieve A new height. As a key part of the medical device field, hand-held medical devices are strictly regulated. First, in the event of a malfunction, a handheld medical device must be able to guarantee the personal safety of the user, rather than causing an accident. Second, when the handheld medical device is damaged during daily use, it should be displayed in a prominent position to inform the patient of the medical device and prevent the patient from continuing to apply. Third, the daily contact area of ​​the hand-held medical device is the hand of the user, so it is necessary to improve the security measures of the hand to avoid wear and scratches.

1.2 Complexity

Modern medical devices combine multidisciplinary research results with complex functions and diverse modules. At the same time, the users of medical devices are also complicated. The users of hand-held medical devices are not all professional medical personnel. The user environment surrounding hand-held medical device products is not only medical personnel. In the family environment, the users are mostly non-medical professionals, and may even be the patients themselves. They do not have basic medical knowledge and medical device operation knowledge. From the perspective of Figure 1, the complexity of handheld medical devices is the core part of handheld medical devices. Its complex characteristics not only determine the performance of other features, but also the actual application of this type of medical devices. Impact. This study believes that the complexity of handheld medical devices is not easy to grasp. In the future work, on the one hand, it is necessary to reduce complex features, improve other characteristics, and help handheld medical devices gain more functions; on the other hand, we must grasp The impact of good complexity should not affect the design and development of handheld medical devices.

2 Design points for handheld medical devices

2.1 Security

The market for hand-held medical devices is very extensive. In order to further meet the needs of patients, handheld medical devices must meet the fixed requirements in the design process, that is, the design points that are said everyday, and at the same time, achieve more in design points. A big breakthrough, otherwise it is difficult to meet the needs of real work. After long-term research, one of the key points in the design of handheld medical devices is safety. Figure 2 is a pulse oximeter. The product is produced by Shenzhen Genearui Co., Ltd. The instrument is designed with the following safety in mind: First, the use of rechargeable Ni-MH batteries: can avoid the possibility of human body exposure to 220V during the patient's use. To improve safety performance, Ni-MH batteries are very stable, storage time is long, and can be used safely for a long time. Second, the blood oxygen probes connected to the human body are all made of biocompatible materials to avoid possible contact with human body for a long time. Allergic reactions; third, considering electrostatic protection, through the national testing requirements, improve the stability and safety of the product. It can be seen that the safety of the product is related to the specific use and effect on the patient and must be taken seriously.

2.2 Modeling

One of the key differences between handheld medical devices and other medical devices is that this type of medical device occupies very little space, mainly by hand, and the operation of smaller medical devices during operation often determines the details. final result. Therefore, the design of hand-held medical devices is very important. First, the shape of the handheld medical device must be small enough to allow the operator to distinguish the function of the medical device in time. In terms of overall shape, it must have outstanding performance and can be found in many medical devices in time. Second, the color of the handheld medical device should be clear, the different colors represent different meanings, and the actual application should be considered. If the lighting is dim, the design of the handheld medical device should be highlighted with bright colors; if the light is bright, apply a soft color. The final thing is that once a special person with color blindness is encountered, the meaning expressed by color is very different. Therefore, in the grasp of color, various situations must be considered. Third, the design of the handheld medical device is also convenient for practical operation. Since this type of medical product is mainly used in the fields of fine surgery, patient disability application, etc., the performance must reach a high level, and it must also have the characteristics of anti-pollution and anti-corrosion, so as to ensure that it will not cause damage to patients and medical personnel. hurt.

2.3 Tactile design

In addition to the two design points mentioned above, the tactile design of handheld medical devices is also a very important aspect. The tactile design is mainly to enable the operator to clearly feel that he is operating the medical device, and at the same time, it is more obvious in feeling, avoiding excessive force or too small force and causing unnecessary influence. Tactile design has always been an important aspect of handheld medical device design, often breaking through as a bottleneck in design. For example, membrane buttons have become the dominant type of lightweight haptic controller. The function of the pulse oximeter membrane button not only has the on/off control function applied to the power supply, but also the other on/off conversion functions: it also has step control function. Taking pulse oximeter plus as an example, affected by the structural function of the pulse oximeter device, the membrane button design should meet the operation rules of a single hand grip. The control button should be operated with a single finger, and the control button arrangement should be difficult to cause. The occurrence of misoperation. From the above description, the tactile design will directly affect the daily use, repair, optimization and other work of the handheld medical device, and will have a greater impact on the user. In the future work, the tactile design must be more humanized, on the one hand to enhance the sensitivity of the touch, on the other hand to increase the prohibition function of the error operation, even if the wrong operation, relying on the tactile design, can be in the first time, for all the will The problems that have occurred will be stopped. Conclusion This study analyzes the design points of handheld medical devices. For existing handheld medical devices, the needs of medical staff and patients have been met to a large extent, but due to the increase in the number of patients and special cases. The emergence of some handheld medical devices is somewhat inadequate in performance, and further design is needed in the future.

In summary, there are many design points for handheld medical devices. In the design work, not only must meet the specifications of design points, but also increase the value of handheld medical devices, and provide more for medical staff and patients. help.

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